Calculating machine function



Oct. 26, 1954 N. R. FRIEBERG ET AL 2,692,726

CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1955 14 Sheets-Sheet 1 INVENTORS NELSON R. FRIEBERG scAR ,F. LARSEN Oct. 26,1954 R FREBERG ET AL 2,692,726

CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1953 14 Sheets-Sheet 2 2 1 zi a THEiR ATTORNEYS 1954 N. R. FRIEBERG ETAL 2,692,726

CALCULATING MACHINE FUNCTION CONTROL MECHANISM I83 use Illt INVENTORS NELSON R. FRIEBERG OSCAR F. LARSEN THEIR ATTORNEYS Oct. 26, 1954 N. R. FRIEBERG EI'AL CALCULATING MACHINE FUNCTION CONTROL MECHANISM l4 Sheets-Sheet 4 Filed April 16, 1953 'INVENTORS NELSON R. FRIEBERG OSCAR F. LARSEN THEIR ATTORNEYS Oct. 26, 1954 FRlEBERG r 2,692,726

CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1953 14 Sheets-Sheet 5 Oct. 26, 1954 N. R. FRIEBERG ET AL CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1953 I 14 Sheets-Sheet 6 hwn mum INVENTORS NELSON R. FRlEBERG OSCAR F. LARSEN BY 4% M THEIR ATTORNEYS Oct. 26, 1954 N. R. FRlEBERG ETAL 2,692,725

CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed Apr il 16, 1953 l4 Sheets-Sheet 7 INVENTORS NELSON R. FRIEBERG OSCAR F. LARSEN g ue/M THElR ATTORNEYS Oct. 26, 1954 N. R. FRIEBERG EI'AL CALCULATING MACHINE FUNCTION CONTROL MECHANISM l4 Sheets-Sheet 8 Filed April 16, 1953 INVENTORS NELSON R. FRIEBERG OSCAR F. LARSEN BY XKWM 6 THEIR ATTORNEYS Oct. 26, 1954 N. R. FRIEBERG ETAL CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1953 FIG. 9

l4 Sheets-Sheet 9 60.00 *A 200.00 ORA I I 0.00 ORB BY fiwl, I

PAGE

NAME R E FITZWATER ADDRESS 24 FARMSIDE DR 442 443 GREDT 444 E DATA DATE REFERENCE/ /CHARGE CRiDIT BALANCE I r BALANCE FORWARD) IO0.00 4m 2 no 25.00 |25.oo SA 1 FEB 2 220 60.00 I85.00 SA 2 FEB 5 200.00- I5.00 c nA 5 FEB 6 555 5.00 10-00 A 4 5 INVENTORS NELSON R. FRIEBERG O SOAR F. LARSE N THEIR A RNEYS Oct. 26, 1954 N. R. FRIEBERG ETAL CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1953 14 Sheefs-Sheet 11 INVENTORS NELSON R.FRIEBERG OSCAR F. LARSEN Jqfm ElR ATTORNEYS Oct. 26, 1954 N. R. FRIEBERG ETAL 2,692,726

CALCULATING MACHINE FUNCTION CONTROL MECHANISM Filed April 16, 1953 l4 Sheets-Sheet l2 SUBTRAOT NON PRINT NON ADD DATE PRINT CIPHER CUT OUT FIG. I5 FIG. l5: FIG. I54

FIG. I51v NELS Cm FQ QS I EBERG 369 369 OSCAR F. LARSEN Q .m w/ fi THEIR ATTORNEYS Oct. 26, 1954 N. R. FRIEBERG ETAL CALCULATING MACHINE FUNCTION CONTROL MECHANISM m Q B. N m .1 EN mmn m h. FA T n 4 R A m w R. a I 4 M I A 5 mm w m .m V 3 5 9 l mmhm l 1 r m d e l 1 F Oct. 26', 1954 N. R. FRIEBERG ETAL 2,692,726

CALCULATING MACHINE FUNCTION CONTRO? MECHANISM Filed April 16, 1953 l4 Sheets-Sheet l4 INVENTORS NELSON R. FRIEBERG OSCAR F'. LARSEN Patented Oct. 26, 1954 CALCULATING MACHINE FUNCTION CONTROL MECHANISM Nelson R. Frieberg and N. Y., assignors to Th Oscar F. Larsen, Ithaca, e National Cash Register Company, Dayton, Ohio, a corporation of Maryland Application April 16, 1953, Serial No. 349,228

7 Claims. 1

This invention relates to a calculating machine, and more particularly pertains to a full keyboard add-subtract bookkeeping machine with a semi-automatic cross-tabulating paper carriage, two totalizers, and controlled machine operation as determined by the position of controls on the paper carriage. The machine also has mechanism by which a carriage-controlled operation may be manually reversed in a particular instance from subtract to add, mechanism by which the main drive of the machine is used to carry out conditions set up by the paper carriage to cause the machine to operate in a particular manner, special printing control mechanism and various controls and interlocks that will become apparent as the machine is described.

Inasmuch as the novel mechanism reaches into practically every part of the machine, and

controls the various operations, a considerable showing of old and well known mechanism has been made, and a brief description of it will be given, together with proper references to issued patents and patent applications that show such old mechanisms in more detail, the essential movements of the parts being given here in order that the new mechanism may be fully understood.

It is an object of this invention to provide a bookkeeping machine having a semi-automatic cross-tabulating carriage, with carriage controls and associated mechanism whereby transaction entries of debit and credit amounts may be posted on a customers account card and on a tape, together with means for proving the entries so made.

It is another object of the invention to provide such a machine, in which certain of the carriage-operated controls operate to set up a condition which is carried out by the main operating mechanism of the machine so that undue load will not be put upon the carriage controls.

With these and incidental objects in View, the invention includes certain novel features of construction and combinations of parts, a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this speci fication.

Of the drawings:

Fig. l is a perspective view of the machine.

Fig. is a right side elevation of the machine with the case removed, and Without the paper carriage mechanism.

Fig. 3 is a left side elevation of the machine with the case removed, and without the paper carriage mechanism.

Fig. 4 is a section through a typical denominational order of the machine, showing the keyboard, the differential mechanism, the totalizer mechanism, and the printing mechanism, but without the paper carriage mechanism.

Fig. 5 is a sectional view of the mechanism Within the right side frame of the machine, and without the paper carriage mechanism.

Fig. 6 is a view of the paper carriage from the rear, showing the carriage control mechanism.

Fig. 7 is a top plan view of the printer section of the machine.

Fig. 8 is a view of the carriage-controlled subtract mechanism.

Fig. 3a is an elevation, as viewed from the right, of part of the date printing control mechanism.

Fig. 9 is a portion of a typical customers account record sheet.

Fig. 10 is a portion of a record tape on which is printed the proof of the transaction shown on the customers record sheet of Fig. 9.

Fig. 11 shows part of the totalizer engaging mechanism with relation to the controls for taking a total.

Fig. 11a is an elevation of the left end of the carriage.

Fig. llb is a view from the left of part of the tabulating pawl mechanism.

Fig. 12 shows a portion of the mechanism for sensing th totalizer mechanism to determine whether the amount in the totalizer, from which a total is to be taken is positive or negative.

Fig. 13 shows the mechanism by which the ordinary condition, in which a total from the A totalizer is taken upon operation of the total-taking mechanism, is changed so that the total is taken from the B totalizer.

Fig. 14 shows a portion of the subtract control mechanism.

Figs. 15a to 15 represent the various stop controls which may be selectively used on the carriage.

Fig. 16 shows the mechanism for carriage control of the ncn-print mechanism.

Fig. 17 shows the mechanism for carriage control of the cipher cut-out mechanism.

Fig. 18 is a top plan view of the cam lever assembly on the carriage.

Fig. 19 shows the mechanism for carriage control of the date and folio printing.

Fig. 20 shows the mechanism for carriage control of the non-add mechanism.

General description Referring to Fig. 1, the machine is provided with a casing 50, a plurality of denominational rows of digit keys 5!, two rows of day-of-the month keys 52, a row of month keys 53, a sight aperture 54 through which the number drums associated with the upper, or A, totalizer may be read, a semi-automatic cross-tabulating paper carriage mounted on rail 56 mounted in turn on a frame-supported rail 55a, a customers record sheet platen 55, and a tape platen 55a, independently rotatably supported by the carriage, the platen 55 being rotatable by the knob 51 and the platen 55a being rotatable by the knob 58. Each platen section has its own vertical paper feeding device, which advances the record material one or more steps at a time for each machine operation, the record advancing devices being constructed so that the feed may be shut off of either one, as desired. The paper carriage also is provided with an injector handle 59, by which the customers record platen 55 may be quickly rotated throughout a movement which will adjust the customers record to the recording area by one forward movement of the handle 59, there being an adjusting device 5% to regulate the throw of this handle. The record feeding and injecting devices will not be described specifically, as such mechanisms have long been known in the art.

The carriage also is equipped with a carriage return lever 653, by which the carriage is moved to the right at the end of a line of entries, the lever Ell acting to advance the record material tape a step for each return movement of the carriage. The preferred operation of the machine is as shown with the tape 6| on the left and the customers record 62 on the right, although the carriage control elements are adjustable to reverse the order. There is also provided a total control key 63, operation of which sets the machine into a two-cycle total-taking operation, a sub-total key M, operation of which sets the machine into a two cycle sub-total operation, both of said keys normally taking the total or sub-total from the upper or A totalizer. A key 55 is provided for entering into the totalizers amounts set up on the keyboard negatively, that is to say, it is a subtract key. The add key 66, or add motor bar, when operated, enters into the totalizers, positively, the amount set up on the digit keys. Key 6? when operated causes a machine operation in which is printed the amount set up on the digit keys but does not enter such amount into the totalizers. The key Ell is a correction key for restoring depressed keys to normal. Key 69 is a Reverse key which, in the event a carriage control element for subtraction, to be described, calls for a subtract operation, reverses the operation to an add operation. Key 10, when depressed, followed by depression of either the total key 63 or the sub-total key 64, causes the machine to take a total or sub-total, as the case may be, from the B totalizer. Lever 7!, when moved to operated position, disables the key restoring mechanism, to be described, so that an entry set up on the keys may be entered repeatedly by repeated operation of the add motor bar 66 or the subtract key 55. Lever 12, when operated, disables the key restoring function for the date keys 52 and 53 so they will not be restored to unoperated condition at the end of machine operation. Lever 5i5 controls the date printing mechanism to function or not, and lever 550 when moved to operative position disables the printing hammers.

The further explanation of the functions of the various described elements of the machine, insofar as is applicable to an understanding of the novel construction claimed, will be given later on.

Referring to Fig. 3, the machine is driven by an electric motor I3, which, when operated, turns a shaft 14 through reduction gearing. Rotatably mounted on shaft 14, is a front crank plate and behind front crank plate 15, and secured to shaft 14, is a notched wheel, not shown, which is adapted to be engaged by a tooth on a pawl 16, pivoted to plate 15 and urged in engaging direction with the notched wheel by a spring ll. There is provided a trip lever shaft '58 having secured thereto a three-armed lever 82, which, when the machine is tripped, moves in a counterclockwise direction, as viewed in Fig. 3, to close the motor switch and release the pawl T6 to the action of spring H, as stud 79 moves away from it. The motor will then start, turning the plate 75 in a counter-clockwise direction for one rotation, the arm 80 on plate 15 striking stud 8| on three-armed lever 82, knocking lever 82 clockwise to put stud E9 in the path of the upper end of pawl 76, as it reaches home position, disengaging plate 15 from motor shaft 14, thus causing the plate 75 to perform the single rotation. The machine is tripped through the forward motion of link 83 (Fig. 2), as is fully described in the application for United States Letters Patent of Roland G. Fowler et al., Serial No. 237,758, filed July 20, 1951, to which reference is made for a more specific description of the machine tripping mechanism. One-cycle operations are performed for addition or subtraction and two-cycle operations are performed for taking a total or a sub-total. One rotation of plate 15 is equivalent to one machine cycle. In twocycle operations the link 83 of Fig. 2 is kept pulled forward until after the second cycle of operation commences. Plate i5 is connected by pitman 8 1 to a rear crank plate 85 which is loosely mounted on the main drive shaft 86 which extends across the rear of the machine. In one rotation of plate i5 the crank plate 85 is rocked first clockwise and then counter-clockwise, as seen in Fig. 3. The rear crank plate 85 is coupled to the main drive shaft 86 through lever B! pivoted to crank plate 85 at 88. Lever 8'! has a stud 89 which is held in a notch of a plate 90 secured to shaft 86 by a spring 53!, extending between the outer end of lever 81 and an arm of crank plate 85, so that the oscillatory motion of the crank plate 85 is yieldingly given to shaft 86, any overload on shaft 85 resulting in stud 89 escaping from the notch in plate 9|. The parts are restored automatically when the overload is removed, when the plate i5 is returned to normal position.

Referring to Fig. 2, which is an elevation of the right side mechanism, the main drive shaft 86 has secured thereto a plate 92 pivotally coupled to a main drive plate 93 by a link 9 Plate 93 is pinned to a cross shaft 95 extending between and journaled in the side frame plates 96 and 91. Upon commencement of a cycle of machine operation both plates 92 and 93 will move counter-clockwise, as seen in Fig. 2, and on the second half of the machine cycle they will return to their home position.

Referring to Fig. 4, which is a :sectionxthrough the machine ifrom front to "back, through a typical denominational order Of the machine, extending across the machine between .the left .sideframe plate'96 and the right side plate 91 (see Fig. 2) is a shaft 98, on which aremounted,

.in equally spaced relation across the machine,

.a series of denominational order "diverging levers, such as lever99, each :havinga rearwardly extending arm I09, coupled by an adjusting link I:I to a printer-bar I02 :mounted in guides I03 .and I04 for vertical movement to position one of the type I94 opposite the printing station in front of the paper platen I05, shown diagrammatically. On a forwardly extending arm of each diverging lever 99 is a rack I06 whereby when the associated lever 99 is-moved counterclockwise in-a machine operation, as will be described, an aligning bar I0! moving in a direction to engage one or another of the teeth of rack I06 at mid-cycle by rotation of cam I08 on shaft 95, will hold the lever in accurately aligned position during the ensuing printing operation, which occurs after such alignment. On .an upwardly extending arm I99 of each lever 99 is mounted an upper, .or A, totalizer-wheelactuating rack I ID, by pin and slot connections, which allows a unit of movement for the entry of carry-over data from the next lower order,

as will be explained, and on a lower extending arm III of diverging lever 99 is a similar rack II2, similarly mounted for actuation of the lower or B totalizer wheel associated with the par- ,ticular denominational .order. Pivoted to the upper arm I09 of each diverging lever is a stop bar N3, the front end of which is slidably mounted inaslot .in a guide comb .I I4 extending across the machine, at the front thereof, the stop bar II3 being iu'ged forwardly by a spring I I5 extending between the stop bar and the comb 'I'I4, urging the associated diverging lever 99 in a counter-clockwise direction. All .of the diverg ing levers are'kept, normally, in a home position by a bail II6, which extends across them all.

'Bail H6 is supported by two arms pinned to s shaft 98, the right arm I I! being shown in. Fig. 5. The lower end of arm. II? is pivoted to a link I I8 having a bifurcated rear end which embraces and rides on main drive shaft 86. 'Link I I8 has a roller H9 thereon which rides the periphery of wardly causing the bail arms to rotate counterclockwise, which permits all the stop bars to move forwardlyunless prevented by the keys, to be described, or by the zero stop elements, to be described, in the event no keys are operated, or by a stop bail I I9, which is moved to an effective positionto stop the forward movement'of all the stop bars during the first cycle of a total operation or of a sub-total operation, or the totalizer wheels on being returned to zero. On the last half of a machine cycle, as the shaft 86 moves clockwise to home position, the bail I I6 brings all the diverging levers and stop bars to home position.

Referring to Figs. 3, i'and '5, the key bank unit includes a top plate 293, a bottom plate IiZi, a right side plate I22, and a left side plate I23, fastened together to form a box-like unit, which is supported at its rear end on cross shaft 424, and supported at the front end by studs, such as stud I25 (Fig. 5) secured on the inside of the side frame plates. 'The digit and-date keys are slida'bly mounted in aligned slots in the .top and bottom plates and each key is normally kept 'in anup, or restored, position by its individual spring I24 (Fig. 4). As seen in Fig. 1, in the particular embodimentof the invention, there are nine rows of digit keys with nine keys in each row,

and a leftmost row of twelve keys representing months of the year, there being twelve keys in this row. As a key'is depressed, its stem moves below the bottom plate I'2I of the key bank unit intothe path of movement of one-or another of associated stop lugs I25 (Fig. 4) on the associated stop-bar. Those stop bars for the digit key banksare equipped with anumber of lugs spaced so that when a digit key of a given value, from one to "nine, is depressed, the associated stop bar :can move only a distance equal to the value of that key in the ensuing machine operation. The month key row has a special stop bar adapted for twelve steps of movement, and the associciated diverging lever has no upper and lower arms, as the movement of its diverging lever is transmitted only to the associated printer bar, which has twelve type therein, representing the months, and that type representing a particular month type is positioned at printing position by control of the associated month key during an operation of the machine. The construetionof the ke bank is such that a key is latched in depressed position-until the end of a machine operation, and then released, to be restored by its spring I24. The depression of a key moves to one side from in front of theassociated stop bar, the conventional zero stop element I26, which otherwise would hold the stop bar to a very short movement during amachine operation, only sufficient to bring the zero type associated therewith to the printing station, the coupling of the associated totalizer racks to the diverging levers being such that such small zero movement is allowed before any movement of the associated totalirzer wheels'can take place. Running along each sideof a row of key stems is a swinging shutter or bail, the one on the left-hand side off-the row being'for the purpose of latching down a depressed key, the edge of the shutter cooperating with formations on the left edge of each key stemfor that purpose, the swinging aside of the shutter by a formation on the downward motion of a'key, releasing any other depressed key, forming a so-called flexible keyboard. The right bail or shutter is the zero stop member, and formations on 'theright side of each key cause the bottom of the zero stop shutter to move outwardlyfrom a key when depressed, the shutter being retained in that position as long as such associated key is depressed. The forward end of the zero stop shutter has depending the zero stop element I25 (Fig. 4) which by the outward movement of the'shutter is moved out of the path of the associated stop bar. These shutters are pivoted in the front plate I 2? and in the rear plate I28 of the key bank unit, and are urged into contact with the sides of the associated key by springs (not shown). In Fig. 4 the shutter 'Iriii isthe'key latc'hshutter for the bank of keys next to the right of that bank of keys shown in i, and shutter I30 is the zero stop shutter situated on the :right of the keys of Fig. 4 and cooperating therewith. The latching shutter for the keys of Fig. 4 is behind the shutter I30, and cannot be seen. Consequently, the depending zero stop .element I26 shown in Fig. 4, cooperates with the :stop .bar next to the right of that one shown in Fig. 4, but the construction and function of the parts can be understood from what has been described. For a more specific disclosure of the keyboard construction reference is made to United States Patent No. 2,062,731, which issued on application of Charles Schroder, December 1, 1936'. The to-talizers are both of the same construction, and for a description of construction, in brief, consideration will be given to the upper, or A, totalizer.

The shaft I24 (Figs. 3, 4 and 5), which is journaled in the side plates of the machine, for lateral shifting, to an add position in the right direction, and to a subtract position in the other direction, has mounted on either end thereof, just inside the side frame plates 36 and 91, totalizer support arms, the outer ends of which hold a shaft I3lla (Fig. 4), on which are rotatably mounted, at intervals across the machine, corresponding to the spacing of the diverging lever racks, totalizer pinions I3I which normally are in line with the associated racks on the diverging levers when in add position, the shaft I24 normally being in rightmost position. Completing the totalizer framework are plates, such as plate I32, which are secured to shaft I24 and supported at the outer ends by pinion shaft I36. One of these plates I 32 is positioned between each tWo totalizer wheels, and each supports on a stud I34 an idler wheel I33, each of which has two sets of teeth side-spaced, with an annular groove there-between, one of the sets of teeth being in mesh with the totalizer pinion with which it is associated, and the other of the sets of teeth being in line with the associated racks when shaft I24 and, consequently, the totalizer framework is in subtract position to the left so that the entry of items will be given to the totalizer pinions in a direction the reverse of that in adding operations. Each of the totalizer pinions has two transfer cams thereon, one which is in line with an add formation on the associated transfer pawl I35, when the totalizer is in add position and the other of which is in line with a subtract formation on the associated transfer pawl when the totalizer is in subtract position. These cams cause the transfer pawl associated with a given totalizer pinion to rock around the supporting rod I36 when the associated totalizer pinion passes through zero, going in either a negative or a positive direction. These cams also act as stops to stop the totalizer in a zero position, as a total or a sub-total is being taken. The rocking down of transfer pawl I35 on an entry passes on a carry-over unit of one to the next higher totalizer wheel in the manner shown in application for United States Letters Patent, Serial No. 323,462, filed by Nelson R. Frieberg and Oscar F. Larsen on December 1, 1952, to which application reference is made for a more specific disclosure of the totalizer and other before-mentioned mechanisms of this machine, the explanation given herein being sufficient for an understanding of the invention.

The lower, or B, totalizer is supported on shaft I31, and includes a set of totalizer pinions I38 and associated idler pinions I39. This lower totalizer also has a set of transfer pawls I43, which act in the same manner as that given in connection with the upper totalizer.

The right totalizer support arm I 4! (Fig. 5), for the upper, or A, totalizer has a downwardly extending arm I42, having a stud I43 which extends into a cam slot I44 in totalizer engaging plate I45 which is rockably supported on frame-supported stud I46. The rocking of cam plate I45 clockwise around its stud I46, from the position shown in Fig. 5, will disengage the associated totalizer from the diverging lever racks with which it is normally engaged when the machine is at rest.

Similarly, the lower, or B, totalizer has a right supporting arm I41 secured to lower totalizer supporting shaft I48, said arm having a rearwardly extending portion I49, with a stud I53 riding in a cam slot I5I of lower totalizer engaging plate I52 mounted on stud I53. Clockwise rotation of the plate I52 will disengage the normally engaged lower totalizer wheels from the associated racks. The upper totalizer has associated with each totalizer pinion a number drum I55 on the periphery of which are numbers which correspond to the position of the wheel, which drums thereby exhibit the accumulated data which may be viewed through the viewing aperture 54 (Fig. 1) in the casing. In a similar manner the lower totalizer has num ber drums I54 thereon, but they are invisible, being within the machine.

Referring to Fig. 3, the shifting of the totalizers for addition or subtraction is accomplished by cam I55 for the upper totalizer and cam I51 for the lower totalizer. These cams each have an edge portion in which a cam slot is cut, the cam slot embracing a stud which extends radially from each of the associated totalizer supporting shafts I24 and I48. As seen in Fig. 3, if cam I56 is turned counter-clockwise by pulling down on lever I58 pivoted thereto, the shaft I24 is moved to the left to put the idler pinions of the upper, or A totalizer in alignment with the associated diverging lever racks, and the counter-clockwise movement of cam I51 will do likewise with the lower totalizer. Cam I51 is turned through link I59 pivoted to the cam at one end and at the other end to plate I66 pivoted to the frame at I6I, which in turn has pivoted thereto a lever I62 corresponding to lever I58. Upward movement of lever I62, from the position shown, moves the cam I51 counterclockwise. Secured to the left end of shaft 95, which is rocked first clockwise, as seen in Fig. 3, on the first half of a machine cycle, and then counter-clockwise on the second half of a machine cycle, is pinned a plate I63, having thereon studs I 64 and I65, which cooperate with surfaces on levers I58 and I62, respectively. In the position of the elements shown in Fig. 3, the oscillation of plate I63 during a machine cycle has no effect on levers I58 and. I62 and their respective cams because stud I65 will move around the arcuate surface I66 and stud I64 will move around arcuate surface I61, and thus the totalizers are left in the add position. Extending across the machine, and journaled in the side frame plates is a subtract shaft I66 (see also Figs. 8 and 14), to the left end of which is pinned a lever I69, which is shown in Fig. 3 in the add position. On subtract operations, either under control of the subtract key 65 (see Fig. 1) or under control of the carriage operated lever 4I5 (see Fig. 8), the lever I69 is rotated clockwise, slightly, as seen in Fig. 3, pulling forward on a link I10 coupled to lever I69 by a pin and slot connection, and moving rearward a link I1I also coupled to lever I69 by a pin and slot connection. At the rearward end of link I16 there is mounted a. stud I12, which rides in a slot I13 in lever I58, and at the rear end of link I1I is a stud I14, which rides in a slot I in link I62. Upon the subtract movement of shaft I98 occurring, lever I58 moves counter-clockwise around its pivot I16 and link I62 moves clockwise around its pivot I11. Under the circumstances, when the machine operation is started, stud I64 will engage surface I18 o-f lever I82, and stud I85 will engage surface I19 of lever E58, and will pull lever I58 downwardly and pull lever I82 upwardly, shifting both totalizers to their subtract positions. Since, as will be made apparent later, a considerable force is required to shift the elements just described, a means has been provided whereby control of the subtract mechanism from the carriage controlled elements is taken over by the motor driven mechanism through a condition set up by the carriage, such mechanism constituting one of the novel features of the invention. Such power driven subtract control conditioning of the machine does not interfere with the normal function of the subtract key in bringing about the same subtract condition of the totalizer shifting elements by manual pressure on the subtract key 95, as is shown in Fig. 14, and as will be later described. At the conclusion of a subtract operation the lever I89 (Fig. 3) is returned to its normal add position at the end of the machine cycle, by springs, one of said springs I88 acting to rock a bell crank lever I8I pivoted at I82 to the left side frame 98 and having on its downwardly extending arm a stud I83, which is positioned within a slot in the rear end of link I18, tending to pull it rearwardly.

In entering an amount into the machine, the amount is first set up on the digit keys and, if the amount is to be entered additively, the add motor bar 88 (Fig. l) is depressed, setting the machine into operation. The stop bars II3 are given a forward excursion of movement during the first half cycle and a homeward excursion during the second half of the machine cycle, the stop bars being stopped by the zero stop elements or the digit key stems, as the case may be. Inasmuch as amounts are entered into the totalizers on the last half of a machine cycle, the totalizers are both disengaged at the beginning of a machine cycle in the manner next to be described.

Referring to Figs. 11 and 20, as the main drive shaft 86 starts moving counter-clockwise, as seen in Fig. 11, a lever I84 secured thereto moves in a like manner. Pivoted to the outer end of lever I84 at I85 is a hook lever I88 normally urged into a position radial to shaft 86 by a spring I81. Lever l86 has on the outer end thereof a hook formation which normally engages a stud I88 on a rearwardly extending arm of three-armed lever I89, pivoted to the frame of the machine at I90. Pivoted to an upwardly extending arm of lever I89 at I9l is a pitman I92 having a downwardly extending arm I93, a forwardly extending arm I94 and a rearwardly extending arm I95. Pitman I92 is normally urged in a clockwise direction, as seen in Fig. 11, around pivot I9I by a spring I96. The downwardly extending arm I93 has a hook which normally embraces stud I91 on a lever I98 pivoted on stud I46, and is caused to keep in engagement with stud I91 by reason of the upper end of a total control lever I99 bearing against the stud 280 on the rearwardly extending arm I95 of pitman I92.

On total-taking and sub-total-taking operations the total control lever I99 is rocked countar-clockwise around its pivot 20I, releasing pitman I92 to the action of spring I96, as will be described in connection with total-taking and sub-total-taking operations. To go back to itementering operations, a stud 292 on lever i98 bears against an upper arm of totalizer engaging cam plate I45 so that clockwise movement of lever I98 will rock the totalizer engaging cam plate I45 in the same direction, disengaging the A totalizer. A hook 283 pivoted to lever I98 at 284 ordinarily couples lever to earn plate I45 50 that when lever I98 moves coimter-clockwise it carries cam plate I45 with it. However, in other than item entries, the lever I98 may be disengaged from cam plate I45 by moving hook 283, as will be later described. At the commencement of a machine cycle of an item-entering operation the lever I34 rocks counter-clockwise causing, through lever I86, the lever I89 also to rock counter-clockwise, which forces pitman I92 downwardly and forwardly to rock the cam plate i 35 clockwise, disengaging the upper, or A, totalizer. At about mid-cycle lever I84 comes to the position shown in dotted line where lever I88 has been forced out of its normal radial position by reason of striking a stud 285 (see Fig. 20 also) on bell crank 285a pivoted to a bracket 285i) secured to lever I89, the lever I88 rocking clockwise until a tail thereon strikes stud 286 on lever I84, causing lever I86 to become blocked against further clockwise movement. When this happens the lever I89 is rocked back to home position, carrying pitman I92 upwardly and rearwardly, and reengaging the upper totalizer with the racks of the associated diverging levers. As the stop bars are returned to home position, the amount set up on the digit keys is set up on the totalizer additively. The foregoing entry operation, if additive, is initiated by depressing th add motor bar 68 (Fig. l), which bears down on stud 201 (Fig. 2) on a lever 298, pivoted at 289 to a four-armed trip lever 2 i 8 pivoted to the machine side frame at 2| I. An upper extending arm 2I2 of a lever 251 also pivoted at 289 to lever 2 ID has a bent-over ear which rests against the rearward edge of an upwardly extending arm 2I3 of lever 2 I 8, and is held in that position, resiliently, by a spring 2I4 extending between said arm 2I2 and the machine frame. A spring 2 I5 keeps the bent-over car on a forwardly extending arm 2 is of lever 2I9 in contact with the upper edge of right side plate 91. A downwardly extending arm of lever 2I0 is pivoted to link 83, before mentioned. Lever 208 has a stud 2Il' which rests on top of the rearwardly extending arm of lever 251. The result is, as the add motor bar presses down on stud 281, four-armed lever 2I9 is rocked, slightly, clockwise, initiating a cycle of machine operation. If the item set up on th keyboard is to be subtracted, the subtract motor bar key 55 (Figs. 1 and 14) is depressed, which presses down on stud 2I8 on subtract plate 2I9 pivoted at 220 to the right side plate I22 of the key bank unit. The under side of stud 2I8, in turn, bears down on the rearwardly extending arm of lever 288 (Fig. 2), with the result that the machine is set into operation, as with the add motor bar. The subtract plate 2l9 has a downwardly and rearwardly extending arm (Fig. 14), which has thereon a stud 22I which, when plate 2I9 is rocked clockwise by the subtract key 65, strikes the forward end of a lever 222, which is secured to subtract shaft I58 (see Fig. 3), rocking it counterclockwise as seen in Fig. 14, or clockwise as seen in Fig. 3, setting up the levers I 58 and I52 in subtract position to cause the A and the B totalizers to be shifted to the left during the first 1 1 half of the ensuing machine cycle so the amount set up on the keys will be entered subtractively.

The B totalizer is disengaged and engaged with the associated racks in item-entering timing in the same manner as the upper tctalizer through pitman 223 (Fig. 11) which is pivoted to threearmed lever 589, said pitman having a hooked arm 225 which normally is held in engagement with a stud 225 on lever 228, pivoted to the side frame at I53, by stud 228 on lever we, said lever 226 having a hook 22! by which it is normally connected to cam plate 552. The cam plate I52, in response to the movement of pitinan 223, rocks clockwise at the beginning or the machine cycle, and back to normal position just before mid-cycle.

From the foregoing it will be understood that on item entries, items, whether items of addition or subtraction, are entered into both the A and the 8" totalizers on such operations, there being no choice.

As will be explained later, the carriage is provided with elements which operate on certain linkages in the machine, when the carriage is at certain positions, to control the subtract mechanism so that the entry of digits set up on the keyboard will be subtracted in both totalizers, even though the add motor bar is used. Furthermore, there is provided a Reverse key (it (Fig. l) to overcome the control of the carriage over the subtract mechanism, so that even though the carriage controls call for a subtract entry, the Reverse key, if operated, will prevent the entry from being a subtract entry.

To release depressed keys at the close of a machine operation, so that they may be resuored for use in a subsequent operation, there is provided a key release bail 23%! (Figs. 2, 4 and 5) which extends across the front of the machine and is supported for rocking motion by pivots 23E (Fig. 4) and 232 (Fig. 5). By rocking the key release bail by pressing downwardly on the stud 233 (Fig. 5) a series of fingers along the bail will push aside the lattching shutters releasing the keys.

Referring to Fig. 2, on the right side plate I22 of the key bank unit is pivoted, at 225, a key release lever 234, which has on its rear end a downwardly extending tail 235 which normally rests on stud 236 on drive plate 93 and is resiliently held there by a spring 231. As the machine operation commences, and the plate 93 rocks counter-clockwise, the lever 234 will rock clockwise under the urge of spring 23l and a by-pass pawl 238 on the front end of lever 234 will strike and by-pass stud 233. On the return of plate 93, on the second half of the machine cycle, the bypass pawl 238 being held against clockwise movement by stud 233 will strike stud 233 solidly, rocking the key release bail to release the depressed keys. Repeat lever II, when moved clockwise around its supporting stud 24B bears down on the upper edge of key release lever 234, preventing it from making its excursion of movement, thus leaving the keys as they were for an ensuing machine operation, which may be repeated as many times as the add motor bar or the subtract motor bar is operated. The key release bail is also rocked in the first cycle of two-cycle, total-taking and sub-total-taking operations by a lever 2d! (Fig. 5) and is retained in that rocked position until the second cycle, so that any keys that happen to be depressed before a total-taking operation or a sub-total-taking operation will be automatically released, so as not to interfere with the proper taking of the total. The correction key 63 15?; (Fig. 1), when depressed, bears down on a stud 2 12 (Fig. 2) on a lever 243, pivoted at 2%. The downwardly extending front end of lever 243 bears against stud 233 of the key release mechanism, the depression of said correction key 6%; thereby causing the release of any depressed keys, so that incorrect values set up may be removed.

The Non-Add key 61 (Fig. l) operates mechanism including link 244 (Fig. 5) and associated mechanism to create a condition within the machine whereby in an operation of the machine, an amount set up on the keyboard is not added into the totalizers, because they are disengaged by the machine during the first part of the first halfcycle and not reengaged until the end of the second half-cycle of operation. The movement of link 2% also sets the machine in operation to set the printing elements to indicate that the item printed was non-added. The mechanism for doing this will not be described further, and attention is directed to the mentioned Frieberg et al. application, Serial No. 323,462, for a complete disclosure of the aforesaid manually controlled nonadd mechanism. The automatic non-add mechanism controlled by the traveling paper carriage is entirely separate and different from the manually controlled mechanism.

In taking a total, the Total key 53 (Fig. l) is depressed, and a foot thereon strikes a stud 2% (Fig. 2) on a slide plate 2 15, mounted by pin and slot couplings on pins 241 and 2:38, causing downward movement of the slide, and clockwise movement of a bell crank lever 250 around its stud 2 19. Bell crank lever 259 has a stud 25E, which normally rests in a notch in the top of a slot 252 in total link 253 pivoted at its lower end to total control plate 25 pivoted to the right side frame plate. Several things then occur; first stud 255 bears down on arm 25%; of lever 25?, thus rocking the trip lever 2H} slightly clockwise, which starts a machine cycle; second, the rocking of total control plate 254 causes a latch 259 pivoted to plate 266 to fall behind shoulder 25! on bell crank lever 262. The bell crank lever 252 is pivoted to the right side frame plate at 263, as is plate 260. The rearwardly extending arm of the bell crank 252 has a stud 263a which rides the lower edge of a cam plate 26 secured to the drive plate 93. At the beginning of a machine cycle, as plate 93 rocks counter-clockwise, the bell crank 262 will be rocked clockwise and carry with it plate 268 because latch 259 is behind shoulder 25!. Plate 266 has a stud 265 pivoted to the upwardly extending rear end of a link 266, which is, by the rocking of plate 266 clockwise, drawn rearwardly, causing rearward movement of a stud 26! (see Fig. 5) which is on the lower end of a bell crank lever 268, rocking the bell crank lever counterclockwise. A stud Z'It on a latch 269 pivoted on a link 2% rests on the forwardly extending arm of bell crank lever 238, and is normally held upwardly so that latch 269 does not ride on top of. the link 21!. The link 2?! is supported at its forward end by being pivotally coupled to lever 2M, before mentioned, and is urged forwardly by a spring 2H. The rear end of link 2']! is pivoted at 2% to the lower extending arm of total control bell crank Hi8 pivoted at 28! to the right side frame plate 9?. Link 2853 (Fig. ll) is pivoted at its rear end to stud 2?2 on bell crank lever 2V3 pivoted to the right side frame plate. The forwardly extending arm of the bell crank 213 has a stud 274, which rides the edge of cam plate 2'55 pinned to shaft 295. The latch 2B9 

